Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Engine: Application and ID


A letter code is used to denote size of the bore, main bearings and rod bearings. This code is located on a boss above the oil filter. This letter code is as follows:
Letter ``B'' - Cyl. bore .010 inch oversize.
Letter ``M'' - Main bearings .010 inch undersize.
Letter ``P'' - Rod bearings .010 inch undersize.
Letter ``C'' - Camshaft block bore .010 inch oversize.
Letters ``PM'' - Main and rod bearings .010 inch undersize.